[Add] FishNet

Assets/FishNet/Runtime/Serializing/GenericReader.cs

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+using FishNet.Documenting;
+using FishNet.Utility;
+using System;
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo(UtilityConstants.GENERATED_ASSEMBLY_NAME)]
+//Required for internal tests.
+[assembly: InternalsVisibleTo(UtilityConstants.TEST_ASSEMBLY_NAME)]
+
+namespace FishNet.Serializing
+{
+    /// <summary>
+    /// Used to read generic types.
+    /// </summary>
+    [APIExclude]
+    public static class GenericReader<T>
+    {
+        public static Func<Reader, T> Read { get; set; }
+        /// <summary>
+        /// True if this type has a custom writer.
+        /// </summary>
+        internal static bool HasCustomSerializer;
+
+        public static void SetRead(Func<Reader, T> value)
+        {
+            /* If a custom serializer has already been set then exit method
+             * to not overwrite serializer. */
+            if (HasCustomSerializer)
+                return;
+
+            bool isGenerated = value.Method.Name.StartsWith(UtilityConstants.GeneratedReaderPrefix);
+
+            //If not generated then unset any generated delta serializer.
+            if (!isGenerated && GenericDeltaReader<T>.HasCustomSerializer)
+                GenericDeltaReader<T>.Read = null;
+
+            //Set has custom serializer if value being used is not a generated method.
+            HasCustomSerializer = !isGenerated;
+            Read = value;
+        }
+    }
+}